#7 *skreit- ~ *gʰreidʰ-
*skreit- is glossed as 'im Kreis gehen' (?) in LIV with the (?) marking the uncertainty of the meaning.
In OEn. We find scrīðan 'to walk, to step' which we still find in Dutch schrijden 'id.'. In Lith. we find skríečiu, skríesti 'to go in a circle', which is where the LIV meaning comes from. But if this root is to be connected with *gʰreidʰ- then the meaning of going in a cirkel rather than 'to walk' is probably secondary.
*gʰreidʰ- is glossed in LIV as 'schreiten'. It is attested in OIr. in:greinn, in:grennat 'to follow', OCS. grędǫ, gręsti 'to go, to come'. Which both point towards a nasal present *gʰri-né-dʰ-.
The root *skreit- is exclusively found in e-grade, o-grade and Ø-grade, since it's a strong verb in Germanic all three reflexes are automatically attested. Lithuanian only points to an e-grade.
The root *gʰreidʰ obviously only points to an n-infixed root.